<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>欢迎页</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
      margin: 0;
      padding: 0;
      display: flex;
      justify-content: start;
      align-items: flex-start;
      height: 100vh;
    }
    .welcome-container {
      background-color: #fff;
      padding: 20px;
      border-radius: 5px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
      max-width: 400px;
      text-align: center;
    }
    .welcome-container h2 {
      margin-top: 0;
    }
    .function-list {
      list-style: none;
      padding: 0;
    }
    .function-list li {
      margin: 10px 0;
    }
  </style>
</head>
<body>
<div class="welcome-container">
  <h2>欢迎！</h2>
  <p>您已成功登录。</p>
  <h3>功能列表</h3>
  <ul class="function-list">
    <li><a href="#">功能 1</a></li>
    <li><a href="#">功能 2</a></li>
    <li><a href="#">功能 3</a></li>
    <li><a href="#">功能 4</a></li>
    <li><a href="#">功能 5</a></li>
  </ul>
  <p><a href="logout">退出登录</a></p>
</div>
</body>
</html>
